Inverse-squeezing receivers for squeezed-state pulse-position modulation under ideal and phase-diffusion conditions
Abstract
We introduce a squeezed-state pulse-position modulation (S-PPM) format, where the empty slots are squeezed vacuum states and the pulse slot is a displaced squeezed state. Based on this property, we propose an inverse-squeezing conditional pulse-nulling (IS-CPN) receiver. In the ideal case, inverse squeezing maps S-PPM into an equivalent coherent-state PPM signal with a large pulse energy, leading to a closed-form expression for the receiver error probability. We further analyze IS-CPN under common phase diffusion using a finite-path MAP formulation with phase-averaged likelihoods. Numerical results show that IS-CPN outperforms conventional CPN under the same energy constraint and remains advantageous under phase noise and finite photon-number resolution. These results demonstrate that combining squeezed-state modulation with inverse-squeezing conditional nulling can improve photon-efficient optical communication.
Cite
@article{arxiv.2606.31541,
title = {Inverse-squeezing receivers for squeezed-state pulse-position modulation under ideal and phase-diffusion conditions},
author = {Enhao Bai and Fengkai Sun and Tianyi Wu and Huankai Zhang and Jian Peng and Chen Dong and Zhenrong Zhang},
journal= {arXiv preprint arXiv:2606.31541},
year = {2026}
}